Open-plan lighting

An open-plan space is not a big room. It is three small rooms that happen to share a ceiling, and treating it as one room is the mistake that makes these spaces feel simultaneously bright and unwelcoming.

The three zones want genuinely different things. A kitchen counter is task lighting at a level that would be uncomfortable to sit under. A dining table wants a defined pool over it and darkness around it. A sofa wants low, warm, indirect light from lamps. Applied evenly across the whole floor, any one of those is wrong for the other two.

So the plan is: calculate each zone separately, light each with its own sources, and control each independently. That last point is where most open-plan spaces fall down.

The kitchen zone needs the most and gets it most easily without wiring. An 18 in. plug-in bar at 1,245 lumens and CRI 92 under the wall cabinets puts light on the counter from above and in front of you, which is where the ceiling can never put it. The full case is in kitchen lighting.

The seating zone is where lamps do the work. A 2,190 lm torchiere in the corner of the living zone lifts that end of the ceiling and gives the eye a boundary, which is what makes a large space read as separate areas rather than one hall. Two of them in opposite corners of the seating area is better than one - the placement reasoning is in where to put a floor lamp.

Keep the color temperature identical throughout. Zoning is about level and position, never about color - and in an open plan every zone is visible from every other, so a cool kitchen next to a warm sofa reads as a mistake rather than a decision. A 2700K CRI 95 bulb throughout is the straightforward answer.

Here is the failure that undoes an otherwise good open-plan scheme: one switch by the door controls everything.

That leaves only two states - all on and all off. Cooking at 6pm and reading at 10pm get the same light, which means the lighting is wrong for one of them and usually both. And the specific pleasure of an open plan at night, with the kitchen dark and the sofa lit and the space contracting to the part you are using, is unavailable.

Rewiring to separate circuits is real electrical work. The routes that need none are the ones this site is built around:

• Put each zone on lamps rather than the ceiling. Lamps have their own switches by definition, so zoning happens automatically.
• Add wireless remotes. A Pico remote for each zone, mounted near where you use that zone, drives up to ten devices with no wiring - see wireless wall remotes.
• Use smart plugs and scenes. Grouping lamps into a cooking scene and an evening scene turns one decision into one button - see schedules and automations.

For a whole property rather than one space, the same reasoning scales up in a whole-home lighting plan.